Sony MZ-R55 Service Manual page 119

IC602 MPC18A20VMEL
30 29 28
OP
1
2 3
IC701 BA6966FV
U OUT 1
RF
2
U IN 3
TIMING
V IN 4
SELECTER
W IN 5
6
COM
OPERATION
CST
7
CONTROL
LOGIC
PHASE
CONTROL
CSL 1 8
SCOPE
CSL 2 9 WAVEFORM
MIX
GND 10
IC806 XC6383B331MR
2 STEP PFM CONTROL
OSC 100/180kHz
BUFFER
2
1
1
VSS EXT
27 26 25 24
23
PRE DRIVER
COMP
+
SAW
COMP
VREF
PRE
DRIVER
8
4 5 6 7
DRIVE HIGH/
SIGNAL LOW
DRIVE
MIX SEPARATOR
LOGIC
EX-OR
VREF
3
VOUT
– 52 –
22 21
20 19
CLK
CHARGE PUMP
OSC
EFM
LOGIC
10 12
9 11
20
V OUT
19 W OUT
PRE
18 NC
17 VM
16 VCC
15 RIB
TSD
STANDBY 14 STBY
13 BRK+
12
BRK–
11 FG
IC804 PST9325UL
VCC/
NC
1
VOLTAGE 4
VCC
DET
RESET
GND 2 SIGNAL
3
OUTPUT
18 17 16
SAW
CONTROL
LOGIC
EN ENB
SAW
BIAS
VREF
13 14 15
VOUT